Polyphenol microsphere for treating heavy metal ions and radionuclides in industrial wastewater as well as preparation method and application of polyphenol microsphere
A technology of heavy metal ions and radionuclides, which is applied in the field of polyphenol microspheres and its preparation, can solve problems such as small size, secondary pollution, and difficult separation, and achieve the effects of easy use, increased flow rate, and large adsorption capacity
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Embodiment 1
[0033] Example 1 Porous polyphenol microspheres (tannic acid)
[0034] 1) Dissolve 3 g of tannic acid (Sigma Reagent Company) in 10 mL of a mixed solvent of absolute ethanol and ultrapure water (Millipore Milli-Q) (volume ratio of ethanol to water is 9:1);
[0035] 2) Add 0.4 mL of 37% hydrochloric acid (the mass ratio of tannic acid to hydrochloric acid is 20.27:1), 0.2 g of surfactant F127 and stir for 30 minutes;
[0036] 3) In step 2), continue to add 1.5 mL of 2.5 mol / L hexamethylenetetramine aqueous solution (the mass ratio of tannic acid to hexamethylenetetramine is 5.7:1), and continue to stir for 30 minutes to obtain the aqueous phase system;
[0037] 4) Add 160 mL of liquid paraffin and 4 g of emulsifier Span 80 into a three-neck round bottom flask, stir well to obtain an oil phase system;
[0038] 5) Add the water phase system in step 3) to the oil phase system in step 4);
[0039] 6) Stir for 2 hours at a stirring speed of 400 rpm, then raise the temperature to ...
Embodiment 2
[0044] Example 2 Porous polyphenol microspheres (gallic acid)
[0045] 1) Dissolve 5 g of gallic acid (Sigma Reagent Company) in 20 mL of a mixed solvent of absolute ethanol and ultrapure water (MilliporeMilli-Q) (volume ratio of ethanol to water is 6:1);
[0046] 2) Add 0.4 g of p-toluenesulfonic acid (Sigma Reagent Company), 1 g of surfactant cetyltrimethylammonium bromide (CTAB) (the mass ratio of gallic acid to p-toluenesulfonic acid is 12.5:1), Stir for 30 minutes;
[0047] 3) Continue to add 1.5 mL of 35~40% formaldehyde aqueous solution (mass ratio of gallic acid to formaldehyde is 9.52:1) in step 2), and continue to stir for 30 minutes to obtain an aqueous phase system;
[0048] 4) Add 200 mL of liquid paraffin and 5 g of emulsifier Span 80 to a three-neck round bottom flask, stir well to obtain an oil phase system;
[0049] 5) Add the water phase system in step 3) to the oil phase system in step 4), and add while stirring;
[0050] 6) Stir at 60°C for 2 hours at a ...
Embodiment 3
[0053] Example 3 Polyphenol millimeter microspheres are used in the treatment of industrial wastewater and radioactive wastewater
[0054] 1) Prepare 50 L of simulated wastewater solution containing sodium, potassium, calcium, magnesium, lead, chromium, uranium and strontium, and adjust the pH value to between 5 and 7 with dilute hydrochloric acid or sodium hydroxide aqueous solution. The formula of simulated wastewater is: 210mg / L Na(Ⅰ), 145 mg / L K(Ⅰ), 90mg / L Ca(Ⅱ), 87mg / L Mg(Ⅱ), 50mg / L Pb(Ⅱ), 43mg / L Cr (Ⅵ), 20mg / L U(Ⅵ), 20mL / L Sr(Ⅱ), and 40 mg / L detergent.
[0055] 2) Pack 10 g of dried polyphenol millimeter microspheres into the adsorption column, and then pass the wastewater containing radionuclides and heavy metal ions through the adsorption column through a peristaltic pump at a flow rate of 15 mL / min;
[0056] 3) Every 30 min-1 h, use an inductively coupled plasma mass spectrometer to measure the concentration of residual metal ions in the wastewater after passing thro...
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